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NinjaTrader

Fintech trading platform with automated strategies

Principal Software Engineer - Trading Systems

Backend EngineeringConfirmed live in the last 24 hours
Full-timeChicago, IL, USA$195k - $220k /yrIn-person

About the Job

Requirements

  • A bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent experience.
  • Extensive experience with high-performance, high-concurrency distributed trading systems.
  • Proven expertise in JVM and performance tuning for high-performance environments.
  • Experience supporting 24/7 production systems, ideally in trading environments.
  • Deep knowledge of networking and protocols, including HTTP/HTTPS, WebSockets, DNS, and TCP/IP.
  • Experience with continuous integration and continuous delivery tools such as Jenkins and GitHub Actions.
  • Strong troubleshooting and debugging skills in high-pressure, real-time conditions.
  • Excellent communication skills and the ability to articulate technical concepts to diverse stakeholders.
  • Experience with functional programming languages within exchange or trading environments.

Responsibilities

  • Design, develop, and optimize Scala-based trading services for high-volume, low-latency, 24/7 environments.
  • Lead architectural strategy for future-state scalability and performance optimization.
  • Mentor and guide junior engineers, promoting best practices and technical excellence.
  • Collaborate with product, engineering, operations, and security teams to translate business requirements into robust and secure technical solutions.
  • Optimize system performance, with a focus on JVM tuning for Scala/Akka-based distributed systems.
  • Enhance monitoring and observability of services for real-time trade execution and operational transparency.
  • Ensure compliance with security policies, regulatory standards, and industry best practices.

Desired Qualifications

  • Experience in low-latency, lock-free development and design.
  • Strong experience with multithreading and concurrency in high-performance environments.
  • Familiarity with binary or custom trading protocols.
  • Strong knowledge of messaging frameworks such as Kafka and RabbitMQ, and network protocols such as UDP and TCP.
  • Hands-on experience implementing HTTP/WebSockets, REST APIs, OAuth, gRPC, and Redis APIs.
  • Deep understanding of order handling and matching engines.
  • Extensive experience with FIX or other market data and order-entry protocols.
  • Practical hands-on experience with cloud-native technologies such as Kubernetes and Docker.
  • Solid grasp of network communications, particularly IP multicast and TCP protocols used in market data feeds.

About the Company

NinjaTrader

Fintech trading platform with automated strategies

NinjaTrader provides a trading platform for active traders in futures, forex, and options. It offers market analysis, advanced charting, trade simulation, and the ability to develop and run automated trading strategies. The core platform is free for charting and simulated trading, with revenue coming from trade commissions, premium features, and third-party tool integrations. Its goal is to help traders analyze, test, and execute trades more efficiently and consistently through accessible tools and an extensible ecosystem.

Company size
501-1,000
Company stage
Debt Financing
Total funding
$100M
Headquarters
Chicago, IL
Founded
2004

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